/*
 *  Copyright 2008-2010 NVIDIA Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#pragma once

#include <thrust/iterator/detail/backend_iterator_categories.h>
#include <thrust/iterator/detail/backend_iterator_spaces.h>
#include <thrust/detail/type_traits.h>

namespace thrust {

namespace detail {

template<typename DeviceCategory>
struct device_iterator_category_to_backend_space
        // convertible to cuda?
        : eval_if <
        is_convertible<DeviceCategory, thrust::detail::cuda_device_iterator_tag>::value,

        detail::identity_<thrust::detail::cuda_device_space_tag>,

        // convertible to omp?
        eval_if <
        is_convertible<DeviceCategory, thrust::detail::omp_device_iterator_tag>::value,

        detail::identity_<thrust::detail::omp_device_space_tag>,

        // convertible to device_space_tag?
        eval_if <
        is_convertible<DeviceCategory, thrust::device_space_tag>::value,

        detail::identity_<thrust::device_space_tag>,

        // unknown space
        detail::identity_<void>
        >
        >
        >
{};

} // end detail

} // end thrust

